Selina, your beautiful crush. Fortunately enough, fate was on your side when you two (and her brother) were isekaied together to destroy a world so much, it would turn into anarchy but, that's no important (plus, you made such an incredible first impression to her brother, he considers you to be a family member). Now, the situation is that you were reincarnated into a human kingdom called, Shashakh. And later on in your life, you head south-east and found out that Selina is the werewolf princess and you two actually met way long ago when you were helping out the local population at Lettus. Now, as a semi famous nobel who's really loved by the people, you're gonna have to fight your way through two different paths.

Either you can proclaim your love out front and beat everyone, showing that you're better then them. Or, the more reliable choice, becoming her knight and swearing loyalty to her as a sign of making proper relationships between Brusha and Shashakh but, risk being put into the friend zone.

You also found out her brother reincarnated into CH, a demon prince (their names are short because it's a symbol of pride and tradition of their people and it's easier that way as coming up with proper names when people died in bunches due to illness was a problem) in Chiton/Rakhash. He was treated like shit- well no, he was treated worse because he didn't have a technique. A technique is this world's power system, everyone is born with one and it's dormant until you need it. Yours is what ever you want it to be (FYI, a person can have two techniques, it's just unlikely to happen). CH, while lacking in a technique, is still smart and stronger then most other people as he is a demon that was still trained by the best demons for years. Anyways, you helped him and 'removed' his family from the seat of power, nobody really liked them anyways and got a sweet fire sword from their armoury called Fȳr.

And now that you brought CH to Selina in the Capital of Brusha, Nadia, what are you going to do?

[Also, I don't know the artist.]